66086731 has 8 divisors (see below), whose sum is σ = 70217280. Its totient is φ = 62021448.

The previous prime is 66086717. The next prime is 66086753. The reversal of 66086731 is 13768066.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-66086731 is a prime.

It is a super-2 number, since 2×66086731² = 8734912028532722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66086771) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14221 + ... + 18286.

It is an arithmetic number, because the mean of its divisors is an integer number (8777160).

Almost surely, 2^66086731 is an apocalyptic number.

66086731 is a deficient number, since it is larger than the sum of its proper divisors (4130549).

66086731 is a wasteful number, since it uses less digits than its factorization.

66086731 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32633.

The product of its (nonzero) digits is 36288, while the sum is 37.

The square root of 66086731 is about 8129.3745761897. The cubic root of 66086731 is about 404.3009451776.

The spelling of 66086731 in words is "sixty-six million, eighty-six thousand, seven hundred thirty-one".